linux-kernel - Re: [4.1.x -- 4.6.x and probably HEAD] Reproducible unprivileged panic/TLB BUG on sparc via a stack-protected rt_sigaction() ka_restorer, courtesy of the glibc testsuite

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Message-ID: <20160529173038.GA31518@ravnborg.org>
Date:	Sun, 29 May 2016 19:30:38 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	David Miller <davem@...emloft.net>
Cc:	nix@...eri.org.uk, linux-kernel@...r.kernel.org,
	sparclinux@...r.kernel.org, fweimer@...hat.com
Subject: Re: [4.1.x -- 4.6.x and probably HEAD] Reproducible unprivileged
 panic/TLB BUG on sparc via a stack-protected rt_sigaction() ka_restorer,
 courtesy of the glibc testsuite

Hi Dave.

> Ok, mystery solved.

Super good explanation...
> 
> ====================
> >From d645a0376b0010cd60ae5651b3b84a56f5b0e5a4 Mon Sep 17 00:00:00 2001
> From: "David S. Miller" <davem@...emloft.net>
> Date: Sat, 28 May 2016 20:41:12 -0700
> Subject: [PATCH 2/2] sparc64: Fix return from trap window fill crashes.
> 
> We must handle data access exception as well as memory address unaligned
> exceptions from return from trap window fill faults, not just normal
> TLB misses.

It would be nice to include the explanation from the mail in the changelog.
It gives a good background information and it is more accessible in the
commit log rather than mails only.

	Sam